// SPDX-License-Identifier: GPL-2.0-or-later /* * DRM driver for Pervasive Displays RePaper branded e-ink panels * * Copyright 2013-2017 Pervasive Displays, Inc. * Copyright 2017 Noralf Trønnes * * The driver supports: * Material Film: Aurora Mb (V231) * Driver IC: G2 (eTC) * * The controller code was taken from the userspace driver: * https://github.com/repaper/gratis */ #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/property.h> #include <linux/sched/clock.h> #include <linux/spi/spi.h> #include <linux/thermal.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_connector.h> #include <drm/drm_damage_helper.h> #include <drm/drm_drv.h> #include <drm/drm_fb_dma_helper.h> #include <drm/drm_fbdev_dma.h> #include <drm/drm_format_helper.h> #include <drm/drm_framebuffer.h> #include <drm/drm_gem_atomic_helper.h> #include <drm/drm_gem_dma_helper.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_managed.h> #include <drm/drm_modes.h> #include <drm/drm_rect.h> #include <drm/drm_probe_helper.h> #include <drm/drm_simple_kms_helper.h> #define REPAPER_RID_G2_COG_ID … enum repaper_model { … }; enum repaper_stage { … }; enum repaper_epd_border_byte { … }; struct repaper_epd { … }; static inline struct repaper_epd *drm_to_epd(struct drm_device *drm) { … } static int repaper_spi_transfer(struct spi_device *spi, u8 header, const void *tx, void *rx, size_t len) { … } static int repaper_write_buf(struct spi_device *spi, u8 reg, const u8 *buf, size_t len) { … } static int repaper_write_val(struct spi_device *spi, u8 reg, u8 val) { … } static int repaper_read_val(struct spi_device *spi, u8 reg) { … } static int repaper_read_id(struct spi_device *spi) { … } static void repaper_spi_mosi_low(struct spi_device *spi) { … } /* pixels on display are numbered from 1 so even is actually bits 1,3,5,... */ static void repaper_even_pixels(struct repaper_epd *epd, u8 **pp, const u8 *data, u8 fixed_value, const u8 *mask, enum repaper_stage stage) { … } /* pixels on display are numbered from 1 so odd is actually bits 0,2,4,... */ static void repaper_odd_pixels(struct repaper_epd *epd, u8 **pp, const u8 *data, u8 fixed_value, const u8 *mask, enum repaper_stage stage) { … } /* interleave bits: (byte)76543210 -> (16 bit).7.6.5.4.3.2.1 */ static inline u16 repaper_interleave_bits(u16 value) { … } /* pixels on display are numbered from 1 */ static void repaper_all_pixels(struct repaper_epd *epd, u8 **pp, const u8 *data, u8 fixed_value, const u8 *mask, enum repaper_stage stage) { … } /* output one line of scan and data bytes to the display */ static void repaper_one_line(struct repaper_epd *epd, unsigned int line, const u8 *data, u8 fixed_value, const u8 *mask, enum repaper_stage stage) { … } static void repaper_frame_fixed(struct repaper_epd *epd, u8 fixed_value, enum repaper_stage stage) { … } static void repaper_frame_data(struct repaper_epd *epd, const u8 *image, const u8 *mask, enum repaper_stage stage) { … } static void repaper_frame_fixed_repeat(struct repaper_epd *epd, u8 fixed_value, enum repaper_stage stage) { … } static void repaper_frame_data_repeat(struct repaper_epd *epd, const u8 *image, const u8 *mask, enum repaper_stage stage) { … } static void repaper_get_temperature(struct repaper_epd *epd) { … } static int repaper_fb_dirty(struct drm_framebuffer *fb, struct drm_format_conv_state *fmtcnv_state) { … } static void power_off(struct repaper_epd *epd) { … } static enum drm_mode_status repaper_pipe_mode_valid(struct drm_simple_display_pipe *pipe, const struct drm_display_mode *mode) { … } static void repaper_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_crtc_state *crtc_state, struct drm_plane_state *plane_state) { … } static void repaper_pipe_disable(struct drm_simple_display_pipe *pipe) { … } static void repaper_pipe_update(struct drm_simple_display_pipe *pipe, struct drm_plane_state *old_state) { … } static const struct drm_simple_display_pipe_funcs repaper_pipe_funcs = …; static int repaper_connector_get_modes(struct drm_connector *connector) { … } static const struct drm_connector_helper_funcs repaper_connector_hfuncs = …; static const struct drm_connector_funcs repaper_connector_funcs = …; static const struct drm_mode_config_funcs repaper_mode_config_funcs = …; static const uint32_t repaper_formats[] = …; static const struct drm_display_mode repaper_e1144cs021_mode = …; static const u8 repaper_e1144cs021_cs[] = …; static const struct drm_display_mode repaper_e1190cs021_mode = …; static const u8 repaper_e1190cs021_cs[] = …; static const struct drm_display_mode repaper_e2200cs021_mode = …; static const u8 repaper_e2200cs021_cs[] = …; static const struct drm_display_mode repaper_e2271cs021_mode = …; static const u8 repaper_e2271cs021_cs[] = …; DEFINE_DRM_GEM_DMA_FOPS(repaper_fops); static const struct drm_driver repaper_driver = …; static const struct of_device_id repaper_of_match[] = …; MODULE_DEVICE_TABLE(of, repaper_of_match); static const struct spi_device_id repaper_id[] = …; MODULE_DEVICE_TABLE(spi, repaper_id); static int repaper_probe(struct spi_device *spi) { … } static void repaper_remove(struct spi_device *spi) { … } static void repaper_shutdown(struct spi_device *spi) { … } static struct spi_driver repaper_spi_driver = …; module_spi_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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